2014-07-01 12:00 - Messages

Development of a High Slip-resistant Footwear Outsole Using a Hybrid Rubber Surface Pattern

The present study examined whether a new footwear outsole with tread blocks and a hybrid rubber surface pattern, composed of rough and smooth surfaces, could increase slip resistance and reduce the risk of fall while walking on a wet floor surface. A drag test was performed to measure static and dynamic coefficient of friction (SCOF and DCOF, respectively) values for the footwear with the hybrid rubber sufrace pattern outosole and two types of commercially available boots that are conventionally used in food factories and restaurant kitchens with respect to a stainless steel floor covered with glycerol solution. Gait trials were conducted with 14 participants who wore the footwear on the wet stainless steel floor. The drag test results indicated that the hybrid rubber surface pattern sole exhibited higher SCOF (≥0.44) and DCOF (≥0.39) values than the soles of the comparative footwear (p<0.001). Because of such high SCOF and DCOF values, the slip frequency (p<0.01), slip distance (p<0.001), and slip velocity (p<0.001) for the footwear with the hybrid rubber surface pattern outsole were significantly lower than those for the comparative footwear, which resulted in no falls during trials.

Source: Yamaguchi T, Hokkirigawa K. Ind. Health. 2014.

Effects of mental fatigue on biomechanics of slips

The objective of this study was to investigate the effects of mental fatigue on biomechanics of slips. A total of 44 healthy young participants were evenly categorised into two groups: no fatigue and mental fatigue. Mental fatigue was induced by performing an AX-continuous performance test. The participants in both groups were instructed to walk on a linear walkway, and slips were induced unexpectedly during walking. We found that mental fatigue has adverse effects in all the three phases of slips. In particular, it leads to increased likelihood of slip initiation, poorer slip detection and a more insufficient reactive recovery response to slips. Based on the findings from the present study, we can conclude that mental fatigue is a risk factor for slips and falls. In order to prevent slip-induced falls, interventions, such as providing frequent rest breaks, could be applied in the workplace to avoid prolonged exposures to cognitively demanding activities.

Source: Lew FL, Qu X. Ergonomics, 2014.

The physiological impact of body armor cooling devices in hot environments

A systematic review
BACKGROUND: Heat-related illness is a primary threat to unit readiness, and individual body armor (IBA) cooling devices represent one potential solution.
PURPOSE: To quantify research findings of active and passive cooling devices designed to reduce physiological strain while wearing IBA during strenuous tasks using a systematic review approach.
METHODS: Literature searches were performed in multiple databases using the key words "physiological," "body armor," "military," "cooling," and "thermal." Two independent reviewers appraised methodological quality using a modified Downs and Black Quality Index. Physiological outcomes were tabulated and effect sizes were calculated when appropriate.
RESULTS: The search yielded 733 citations, with nine articles fitting our inclusion criteria: six articles with active and three articles with passive cooling devices.
RESULTS reveal a moderate level of methodological quality. On average, all six active IBA cooling device studies compared to controls (IBA only) reported decreases in one or more measures of physiological strain-core and skin temperature, heart rate. Conversely, passive cooling device effects were negligible.
CONCLUSION: Active cooling devices may decrease the physiological strain associated with wearing IBA in hot environments. Further development of optimal cooling strategies to reduce physiological strain during operations where IBA is required is warranted.

Source: Goforth C, Lisman P, Deuster P. Mil. Med. 2014; 179(7): 724-734.

Safety and Occupational Footwear

This new, one-of-a kind ASTM reference guide provides the latest information on safety and occupational footwear. Topics cover:
• Construction of footwear
• Component materials
• Performance requirements
• Use and maintenance
As well as an in-depth understanding into specific areas of concern, such as slip resistance, the number one cause of concern across all industries.

Source: http://www.astm.org/DIGITAL_LIBRARY/MNL/SOURCE_PAGES/MNL71.htm

Double Gloves

A Randomized Trial to Evaluate a Simple Strategy to Reduce Contamination in the Operating Room
BACKGROUND: Oral flora, blood-borne pathogens, and bacterial contamination pose a direct risk of infection to patients and health care workers. We conducted a study in a simulated operating room using a newly validated technology to determine whether the use of 2 sets of gloves, with the outer set removed immediately after endotracheal intubation, may reduce this risk.
METHODS: Forty-one anesthesiology residents (PGY 2-4) were enrolled in a study consisting of individual or group simulation sessions. On entry to the simulated operating room, the residents were asked to perform an anesthetic induction and tracheal intubation timed to approximately 6 minutes; they were unaware of the study design. Of the 22 simulation sessions, 11 were conducted with the intubating resident wearing single gloves, and 11 with the intubating resident using double gloves with the outer pair removed after verified intubation. Before the start of the scenario, we coated the lips and inside of the mouth of the mannequin with a fluorescent marking gel as a surrogate pathogen. After the simulation, an observer examined 40 different sites using a handheld ultraviolet light in the operating room to determine the transfer of surrogate pathogens to the patient and the patient's environment. Residents who wore double gloves were instructed by a confederate nurse to remove the outer set immediately after completion of the intubation. Forty sites of potential intraoperative pathogen spread were identified and assigned a score.
Results: The difference in the rate of contamination between anesthesiology residents who wore single gloves versus those with double gloves was clinically and statistically significant. The number of sites that were contaminated in the operating room when the intubating resident wore single gloves was 20.3 +/- 1.4 (mean +/- SE); the number of contaminated sites when residents wore double gloves was 5.0 +/- 0 .7 (P < 0.001).
CONCLUSIONS: The results of this study suggest that when an anesthesiologist wears 2 sets of gloves during laryngoscopy and intubation and then removes the outer set immediately after intubation, the contamination of the intraoperative environment is dramatically reduced.

Source: Birnbach, David j., Rosen, Lisa F., Fitzpatrick, Maureen, Carling, Philip, Arheart, Kristopher L., et Munoz-Price, L. Silvia. (2014). Anesthesia & Analgesia.

Chute par-dessus bord de l’équipage des homardiers du Québec

Analyse des risques et pistes de prévention
L’activité de pêche commerciale est l’une des plus dangereuses du domaine industriel. Des chutes par-dessus bord se produisent chaque saison de pêche et leurs conséquences sont généralement graves, parfois mortelles. Au cours des dernières années, deux décès sont survenus dans ces circonstances au Québec lors d’activités de pêche au homard. De façon générale les causes documentées des chutes par-dessus bord sont la perte d’équilibre et l’entraînement par le gréement de pêche. Les objectifs de cette recherche sont : 1) d’analyser les risques de chute par-dessus bord et leurs déterminants lors de la pêche au homard, 2) de documenter les moyens de prévention collectifs et individuels pouvant être adaptés aux homardiers, 3) d’identifier les pistes les plus prometteuses de réduction des risques. Ces objectifs sous-tendent une compréhension approfondie de l’activité de travail de cette pêche. Cette étude s’est déroulée sur une période d’un an.

Source: http://www.irsst.qc.ca/-publication-irsst-chute-par-dessus-bord-homardiers-r-831.html

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